CN218678850U - Streamer discharge driving device and purifying equipment - Google Patents

Abstract

The utility model discloses a streamer discharge drive arrangement and clarification plant, streamer discharge drive arrangement includes: a direct-current power supply section for supplying a direct-current bias voltage, the direct-current power supply section including an output voltage adjusting unit configured to control an operating current of the direct-current power supply section according to a reference given voltage and an output direct-current voltage of the direct-current power supply section to adjust the direct-current bias voltage; a pulse generating section configured to generate a pulse voltage; and the coupling part is respectively connected with the direct-current power supply part and the pulse generation part, and is configured to couple the direct-current bias voltage and the pulse voltage so that the pulse voltage is superposed on the direct-current bias voltage and then applied to a load. The utility model discloses a streamer discharge drive arrangement adopts the mode of high voltage direct current coupling high voltage pulse, has improved breakdown voltage's bound scope, has reduced the phenomenon of striking sparks, has improved stability, has also reduced the concentration of ozone simultaneously.

Description

Streamer discharge driving device and purifying equipment

Technical Field

The utility model relates to a clarification plant technical field especially relates to a streamer discharge drive arrangement and clarification plant.

Background

In gas discharge, the ionization degree of a discharge space with a non-uniform electric field is obviously greater than that generated by electron avalanche, and strong light radiation is generated in the discharge process due to the high ionization degree, so that a linear ionization channel with branches can be observed. If the discharge electrode is asymmetric, the discharge shape can be further elongated before the voltage rises to the breakdown voltage, a phenomenon known as streamer or streamer. In the related art, active substances with chemical characteristics can be generated in the streamer discharge process, and the active substances can be used for purifying and sterilizing, and have more visual effects. The traditional DC power supply has a narrow pre-breakdown photovoltaic working area, is sensitive to electrode installation precision, is difficult to control and is easy to ignite, and more ozone is generated.

Disclosure of Invention

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a streamer discharge drive arrangement adopts the mode of high voltage direct current coupling high voltage pulse, has improved breakdown voltage's bound scope, has reduced the phenomenon of striking sparks, has improved stability, has also reduced the concentration of ozone simultaneously.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a streamer discharge driving device, including: a direct-current power supply section for supplying a direct-current bias voltage, the direct-current power supply section including an output voltage adjusting unit configured to control an operating current of the direct-current power supply section in accordance with a reference given voltage and an output direct-current voltage of the direct-current power supply section to adjust the direct-current bias voltage; a pulse generating section configured to generate a pulse voltage; the coupling part is respectively connected with the direct current power supply part and the pulse generation part, and the coupling part is configured to couple the direct current bias voltage and the pulse voltage so that the pulse voltage is superposed on the direct current bias voltage and then applied to a load.

In addition, the streamer discharge driving device provided according to the above embodiment of the present invention may also have the following additional technical features:

according to an embodiment of the present invention, the dc power supply unit further includes a current control unit, a first transformer and a rectification voltage-multiplying unit, the current control unit is connected to the primary winding and the auxiliary winding of the first transformer, the current control unit is configured to control the primary side coupling voltage of the first transformer according to the current regulation signal outputted from the output voltage regulation unit, the rectification voltage-multiplying unit is connected to the secondary winding of the first transformer, and the rectification voltage-multiplying unit is configured to rectify and multiply the secondary side coupling voltage of the first transformer to output the dc offset voltage.

According to an embodiment of the present invention, the current control unit includes: one end of the first inductor is connected to a positive direct-current voltage end, and the other end of the first inductor is connected with a middle tap of the primary winding; a collector of the first triode is connected with the first end of the primary winding, and a base of the first triode is connected with the first end of the auxiliary winding; a base electrode of the second triode is connected with the second end of the auxiliary winding, a collector electrode of the second triode is connected with the second end of the primary winding, and an emitting electrode of the second triode is connected with an emitting electrode of the first triode and then connected to a direct-current voltage negative electrode end; one end of the first resistor is connected with the base electrode of the first triode; one end of the second resistor is connected with the base electrode of the second triode, and the other end of the second resistor is connected with the other end of the first resistor and then serves as the current control end of the current control unit; and the resonant capacitor is connected between the collector electrode of the first triode and the collector electrode of the second triode.

According to the utility model discloses an embodiment, the rectification voltage doubling unit is at least one-level voltage doubling circuit.

According to the utility model discloses an embodiment, rectification voltage doubling unit includes: the anode of the first diode is connected with the first end of the secondary winding; one end of the first capacitor is connected with the second end of the secondary winding and then grounded, and the other end of the first capacitor is connected with the cathode of the first diode; one end of the second capacitor is connected with the anode of the first diode; the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the other end of the second capacitor; one end of the third capacitor is connected with the anode of the second diode; and the anode of the third diode is connected with the cathode of the second diode, and the cathode of the third diode is connected with the other end of the third capacitor and is used as the output end of the rectifying voltage-multiplying unit.

According to the utility model discloses an embodiment, output voltage regulating unit includes: one end of the first feedback resistor is connected with the output end of the rectifying voltage-multiplying unit; one end of the second feedback resistor is connected with the other end of the first feedback resistor, the second feedback resistor is provided with a first node, and the other end of the second feedback resistor is grounded; a first operational amplifier, a first input end of which is connected to the first node, and an output end of which is used as an output end of the output voltage regulating unit; one end of the third resistor is connected with the second input end of the first operational amplifier, and the other end of the third resistor is connected to a reference given voltage supply end; the first operational amplifier comprises a first resistor and a first capacitor which are connected in series, and the first resistor and the first capacitor which are connected in series are connected between the first input end and the output end of the first operational amplifier.

According to the utility model discloses an embodiment, output voltage regulating unit still includes the isolation component, the isolation component sets up first node with between first operational amplifier's the first input.

According to the utility model discloses an embodiment, keep apart the subassembly and include second operational amplifier and keep apart the chip, the first input of second operational amplifier with first node links to each other, the second input of second operational amplifier with the output of second operational amplifier links to each other, keep apart the chip the input with the output of second operational amplifier links to each other, keep apart the chip the output with the first input of first operational amplifier links to each other.

According to an embodiment of the invention, the waveform of the pulsed voltage is a dual-exponential pulse waveform.

According to an embodiment of the present invention, the pulse generating portion includes a charge control unit, a discharge control unit, a second transformer, and a double-exponential-wave shaping unit, the charge control unit is configured to control the primary winding of the second transformer to be charged, the discharge control unit is configured to control the primary winding of the second transformer to be discharged, the double-exponential-wave shaping unit is configured to shape a voltage waveform of the secondary winding coupling of the second transformer, obtaining the double-exponential-pulse waveform.

According to the utility model discloses an embodiment, the charge control unit includes: one end of the second inductor is connected to the positive end of the direct-current voltage; the anode of the fourth diode is connected with the other end of the second inductor; and one end of the fifth capacitor is connected with the cathode of the fourth diode and is provided with a second node, the other end of the fifth capacitor is grounded, and the second node is connected with the first end of the primary winding of the second transformer.

According to an embodiment of the present invention, the discharge control unit includes: a fifth resistor having one end configured to receive a control signal; one end of the sixth resistor is connected with the other end of the fifth resistor and is provided with a third node, and the other end of the sixth resistor is connected to the negative end of the direct-current voltage; a control end of the switching tube is connected with the third node, a first end of the switching tube is connected with a second end of the primary winding of the second transformer, and a second end of the switching tube is connected with the other end of the sixth resistor; the sixth capacitor and the seventh resistor are connected in series, and the sixth capacitor and the seventh resistor are connected in series between the first end and the second end of the switching tube.

According to an embodiment of the present invention, the control signal is a PWM signal.

According to an embodiment of the present invention, the duty cycle of the PWM signal and the amplitude of the dual-exponential pulse waveform are in a positive correlation.

According to an embodiment of the present invention, the interval time of the PWM signal and the repetition frequency of the dual-exponential pulse waveform are in a negative correlation relationship.

According to the utility model discloses an embodiment, two exponential wave shaping units include: a fifth diode, an anode of the fifth diode being connected to the first end of the secondary winding of the second transformer; and one end of the dummy load is connected with the cathode of the fifth diode and is used as the output end of the double exponential wave shaping unit, and the other end of the dummy load is connected with the second end of the secondary winding of the second transformer and then is grounded.

According to an embodiment of the present invention, the coupling portion includes: the anode of the sixth diode is connected with the output end of the direct-current power supply part; one end of the eighth resistor is connected with the cathode of the sixth diode; one end of the third inductor is connected with the other end of the eighth resistor; and one end of the coupling capacitor is connected with the output end of the pulse generation part, and the other end of the coupling capacitor is connected with the other end of the third inductor and serves as the output end of the coupling part.

In order to achieve the above object, an embodiment of a second aspect of the present invention provides a purification apparatus, including a streamer discharge driving device according to the above.

The utility model discloses streamer discharge drive arrangement and clarification plant, streamer discharge drive arrangement is including the DC power supply portion that is used for providing DC bias voltage, pulse generation portion and coupling portion, DC power supply portion can produce negative polarity high voltage direct current or positive polarity high voltage direct current, provide the electric field with higher speed for positive and negative ion, the DC bias voltage amplitude of its output is adjustable, pulse generation portion can produce the double exponential ripples of us level, its output pulse's amplitude and interval time are adjustable, coupling portion links to each other with DC power supply portion and pulse generation portion, prevent to exchange and direct current influence each other, also can normally superpose the coupling and apply on the load when guaranteeing DC power supply portion and pulse generation portion independent work. The utility model adopts the mode of high voltage direct current coupling high voltage pulse, on one hand, the limit range of breakdown voltage is improved, the phenomenon of striking sparks is greatly reduced, and the stability is also improved; on the other hand, higher ionization degree is obtained, the activity of ions is stronger, the sterilization effect is better, and the concentration of ozone is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a streamer discharge driving device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a dc power supply unit according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an isolation assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pulse generating unit according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the relationship between dc bias voltage and pulse size according to an embodiment of the present invention;

fig. 6 is a voltage schematic after coupling according to an embodiment of the invention;

FIG. 7 is a schematic structural diagram of a streamer discharge driver and a purge load according to an embodiment of the invention;

fig. 8 is a schematic structural diagram of a purification apparatus according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The streamer discharge driving device and the purification device according to the embodiments of the present invention will be described in detail with reference to the drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a streamer discharge driving device according to an embodiment of the present invention.

In an embodiment of the present invention, as shown in fig. 1, the streamer discharge driving device 100 includes: a dc power supply section 10 for supplying a dc bias voltage, the dc power supply section 10 including an output voltage adjusting unit configured to control an operating current of the dc power supply section according to a reference given voltage and an output dc voltage of the dc power supply section 10 to adjust the dc bias voltage; a pulse generating part 20 configured to generate a pulse voltage; and a coupling unit 30, wherein the coupling unit 30 is connected to the dc power supply unit 10 and the pulse generating unit 20, respectively, and the coupling unit 30 is configured to couple the dc bias voltage and the pulse voltage such that the pulse voltage is superimposed on the dc bias voltage and then applied to the load.

Specifically, the streamer discharge driving device 100 includes three parts, namely a dc power supply part 10, a pulse generation part 20 and a coupling part 30, the dc power supply part 10 is configured to generate negative polarity high voltage dc or positive polarity high voltage dc, i.e., dc bias voltage, to provide an accelerating electric field for positive and negative ions, and the amplitude of the dc bias voltage output by the dc power supply part 10 is adjustable. The dc power supply unit 10 adjusts the dc bias voltage based on an externally specified reference voltage and the output dc voltage of the dc power supply unit 10 itself.

More specifically, the pulse generating section 20 is configured to generate a pulse voltage. The coupling unit 30 is connected to the dc power supply unit 10 and the pulse generating unit 20, so that on one hand, dc power generated by the dc power supply unit 10 and ac power generated by the pulse generating unit 20 can be prevented from affecting each other, and on the other hand, the dc power supply unit 10 and the pulse generating unit 20 can be normally coupled while ensuring their independent operations, and the coupled voltage can be applied to a load.

The pulse generating unit 20 may generate a us-level double-exponential wave voltage, and the amplitude and interval time of the output pulse voltage may be adjusted. The duty ratio and the interval time of the control signal received by the pulse generating part 20 can adjust the amplitude and the frequency of the double-exponential-wave voltage generated by the pulse generating part 20.

In an embodiment of the present invention, as shown in fig. 2, the dc power supply unit 10 further includes a current control unit 1, a first transformer T1 and a rectification voltage doubling unit 2, the current control unit 1 is connected to the primary winding (A, B) of the first transformer T1 and the auxiliary winding C, the current control unit 1 is configured to control the primary side coupling voltage of the first transformer T1 according to the current regulation signal output by the output voltage regulation unit 3, the rectification voltage doubling unit 2 is connected to the secondary winding D of the first transformer T1, and the rectification voltage doubling unit 2 is configured to rectify and double the secondary side coupling voltage of the first transformer T1 to output the dc bias voltage.

Specifically, the dc power supply section 10 includes a current control unit 1, a first transformer T1, a rectifying voltage-multiplying unit 2, and an output voltage regulating unit 3, where the first transformer T1 is a step-up transformer, and both ends of the first transformer T1 are respectively provided with a primary winding (A, B) and a secondary winding D, the primary winding is composed of two half-windings, such as a half-winding a and a half-winding B shown in fig. 2, and the primary winding side is further provided with an auxiliary winding C. The current control unit 1 is connected with a primary winding (A, B) and an auxiliary winding C of the first transformer T1, and the rectifying voltage doubling unit 2 is connected with a secondary winding D of the first transformer T1.

More specifically, the output voltage adjusting unit 3 is connected to the current control unit 1, and outputs a current adjusting signal to the current control unit 1, and the current control unit 1 controls the current of the primary side of the first transformer T1 according to the current adjusting signal output by the output voltage adjusting unit 3, so as to control the primary side coupling voltage of the first transformer T1. The primary side coupling voltage is subjected to boosting processing by the first transformer T1 to obtain a secondary side coupling voltage of the first transformer T1, the rectifying voltage doubling unit 2 is used for rectifying and voltage doubling the secondary side coupling voltage of the first transformer T1, and the multiple of the voltage doubling of the rectifying voltage doubling unit 2 depends on the number of diodes and capacitors in the rectifying voltage doubling unit 2.

In an embodiment of the present invention, the rectifying voltage-doubling unit 2 is at least one voltage-doubling circuit.

Specifically, when only a set of diode and electric capacity in the rectification voltage doubling unit 2, the rectification voltage doubling unit 2 is one-level voltage doubling circuit, the utility model discloses use tertiary voltage doubling circuit to explain as an example, have three sets of diode and electric capacity as shown in fig. 2 rectification voltage doubling unit 2 promptly.

In an embodiment of the present invention, as shown in fig. 2, the current control unit 1 includes: one end of the first inductor L1 is connected to the positive terminal of the direct-current voltage VCC, and the other end of the first inductor L1 is connected with a middle tap of the primary winding; a collector of the first triode Q1 is connected with the first end of the primary winding, and a base of the first triode Q1 is connected with the first end of the auxiliary winding C; a base electrode of the second triode Q2 is connected with the second end of the auxiliary winding C, a collector electrode of the second triode Q2 is connected with the second end of the primary winding, and an emitting electrode of the second triode Q2 is connected with an emitting electrode of the first triode Q1 and then connected to a direct-current voltage negative electrode end; one end of the first resistor R1 is connected with the base electrode of the first triode Q1; one end of the second resistor R2 is connected with the base electrode of the second triode Q2, and the other end of the second resistor R2 is connected with the other end of the first resistor R1 and then serves as the current control end of the current control unit 1; and the resonant capacitor CS is connected between the collector electrode of the first triode Q1 and the collector electrode of the second triode Q2.

Specifically, the current control unit 1 includes a first inductor L1, a first triode Q1, a second triode Q2, a first resistor R1, a second resistor R2, a resonant capacitor CS, and a dc voltage VCC, and the dc voltage VCC supplies power to the current control unit 1, and further includes a bus capacitor Cin connected in parallel at both ends thereof. The first inductor L1 is connected with a direct-current voltage VCC and used for adjusting current ripples, the first triode Q1 and the second triode Q2 are connected with a primary side winding of the first transformer T1 to form a feedback circuit, bases of the first triode Q1 and the second triode Q2 are respectively connected through the first resistor R1 and the second resistor R2 and then serve as a current control end of the current control unit 1, and the current control end of the current control unit 1 is connected with the output voltage adjusting unit 3.

Further specifically, the output voltage adjusting unit 3 controls the on/off of the first triode Q1 and the second triode Q2 by controlling the current control end of the current control unit 1, and controls the alternative work of the first triode Q1 and the second triode Q2 by the positive feedback of the first triode Q1 or the negative feedback of the second triode Q2 and the negative feedback of the first triode Q1 or the positive feedback of the second triode Q2, thereby realizing the inversion from direct current to alternating current in the current control unit 1.

It should be noted that the first transistor Q1 and the second transistor Q2 may be NPN transistors.

In an embodiment of the present invention, as shown in fig. 2, the rectifying voltage-multiplying unit 2 includes: the anode of the first diode D1 is connected with the first end of the secondary winding D of the first transformer T1; one end of the first capacitor C1 is connected with the second end of the secondary winding D and then grounded, and the other end of the first capacitor C1 is connected with the cathode of the first diode D1; one end of the second capacitor C2 is connected with the anode of the first diode D1; the anode of the second diode D2 is connected with the cathode of the first diode D1, and the cathode of the second diode D2 is connected with the other end of the second capacitor C2; one end of the third capacitor C3 is connected with the anode of the second diode D2; and an anode of the third diode D3 is connected to a cathode of the second diode D2, and a cathode of the third diode D3 is connected to the other end of the third capacitor C3 and serves as an output end of the rectifying and voltage-multiplying unit 2.

Specifically, two ends of the secondary winding end of the first transformer T1 are connected in parallel with three diodes, which are a first diode D1, a second diode D2, and a third diode D3, respectively, and each diode is configured with a capacitor, which is correspondingly a first capacitor C1, a second capacitor C2, and a third capacitor C3, respectively. The first diode D1, the second diode D2, the third diode D3, the first capacitor C1, the second capacitor C2 and the third capacitor C3 are mutually matched to realize rectification of current at the secondary winding end of the first transformer T1 and voltage doubling of the voltage at the secondary winding end. After the ac signal inverted by the current control unit 1 is boosted by the first transformer T1 and the voltage-doubled by the rectification voltage-doubling unit 2, a high-voltage dc Vo, i.e., a dc bias voltage, is obtained as an output terminal of the rectification voltage-doubling unit 2.

Further specifically, the output voltage regulating unit 3 may adjust the dc bias voltage according to the high-voltage dc Vo output by the rectifying voltage doubling unit 2 and an external reference given voltage.

In an embodiment of the present invention, as shown in fig. 2, the output voltage adjusting unit 3 includes: one end of the first feedback resistor RR1 is connected with the output end of the rectifying voltage-multiplying unit 2; one end of the second feedback resistor RR2 is connected to the other end of the first feedback resistor RR1, and the second feedback resistor RR2 has a first node, and the other end of the second feedback resistor RR2 is grounded; a first operational amplifier OMP1, wherein a first input end of the first operational amplifier OMP1 is connected with the first node, and an output end of the first operational amplifier OMP1 is used as an output end of the output voltage regulating unit 3; one end of the third resistor R3 is connected with the second input end of the first operational amplifier OMP1, and the other end of the third resistor R3 is connected to a reference given voltage Vref providing end; a fourth resistor R4 and a fourth capacitor C4 connected in series, the fourth resistor R4 and the fourth capacitor C4 connected in series are connected between the first input terminal and the output terminal of the first operational amplifier OMP 1.

Specifically, the output voltage adjusting unit 3 is an adjusting circuit composed of a first operational amplifier OMP1, the voltage of the output end of the rectifying voltage-multiplying unit 2 forms a feedback signal FB after being divided by a first feedback resistor RR1 and a second feedback resistor RR2, one end of the first operational amplifier OMP1 is connected with the feedback signal FB, a fourth capacitor C4 and a fourth resistor R4 are connected with the feedback signal FB to form a feedback adjusting part with the output end of the first operational amplifier OMP1, vref is an external reference given voltage, and is connected to the other input end of the first operational amplifier OMP1 through a third resistor R3. The output end of the first operational amplifier OMP1 is connected with the current control end of the current control unit 1.

Further specifically, by adjusting the external reference given voltage Vref, the current control signal at the output end of the first operational amplifier OMP1 can be adjusted, so as to control the driving current of the first triode Q1 and the second triode Q2 of the current control unit 1, and further change the primary side winding coupling voltage of the first transformer T1, thereby controlling the output dc voltage Vo of the rectification voltage doubling unit 2, i.e., the dc bias voltage.

It should be noted that the external reference given voltage Vref and the dc bias voltage have a positive correlation, that is, adjusting the external reference given voltage Vref increases, the corresponding dc bias voltage increases, adjusting the external reference given voltage Vref decreases, and the dc bias voltage decreases.

The output voltage adjusting unit 3 may further be provided with an isolation component before the first operational amplifier OMP1, for isolating an influence of the dc bias voltage output by the rectifying voltage-multiplying unit 2 on the output voltage adjusting unit 3.

In an embodiment of the present invention, the output voltage regulating unit 3 may further include an isolation component, and the isolation component is disposed between the first node and the first input terminal of the first operational amplifier OMP 1.

Specifically, the two input ends of the first operational amplifier OMP1 are respectively connected to an external reference given voltage Vref and the dc bias voltage Vo output by the rectifying voltage doubling unit 2, except for adjusting the dc bias voltage by adjusting the external reference given voltage Vref, the dc bias voltage to which the dc voltage Vo output by the rectifying voltage doubling unit 2 itself has an influence, and an isolation component may be disposed between the first node and the first input end of the first operational amplifier OMP1 for isolating the influence of the dc bias voltage to which the dc voltage Vo output by the rectifying voltage doubling unit 2 itself has.

In the embodiment of the present invention, as shown in fig. 3, the isolation component includes a second operational amplifier OMP2 and an isolation chip IC, the first input terminal of the second operational amplifier OMP2 is connected to the first node, the second input terminal of the second operational amplifier OMP2 is connected to the output terminal of the second operational amplifier OMP2, the input terminal of the isolation chip IC is connected to the output terminal of the second operational amplifier OMP2, and the output terminal of the isolation chip IC is connected to the first input terminal of the first operational amplifier OMP 1.

Specifically, the utility model discloses dispose the isolation subassembly before the input of first operational amplifier OMP1 in output voltage regulating unit 3, realize the isolation of the output signal of rectification voltage doubling unit 2 through second operational amplifier OMP2 and isolation chip IC, can reduce the influence of the secondary of rectification voltage doubling unit 2 to the input stage like this. The isolation component can be arranged or not arranged, the utility model discloses do not restrict the isolation component.

In one embodiment of the present invention, the waveform of the pulse voltage is a dual-exponential pulse waveform.

Specifically, produce impulse voltage by pulse generation portion 20, the utility model discloses a two index pulse waveform is as the impulse voltage that pulse generation portion 20 produced, and pulse generation portion 20 can produce the two index ripples that reach us level to the amplitude and the frequency of two index pulse waveform are adjustable.

In an embodiment of the present invention, as shown in fig. 4, the pulse generating part 20 includes a charging control unit 4, a discharging control unit 5, a second transformer T2 and a double-exponential wave shaping unit 6, the charging control unit 4 is configured to control the primary winding of the second transformer T2 to be charged, the discharging control unit 5 is configured to control the primary winding of the second transformer T2 to be discharged, and the double-exponential wave shaping unit 6 is configured to shape the voltage waveform coupled to the secondary winding of the second transformer T2 to obtain the double-exponential pulse waveform.

Specifically, the charging control unit 4 charges a primary winding of the second transformer T2, the discharging control unit 5 discharges the primary winding of the second transformer T2, the charging control unit 4 and the discharging control unit 5 work alternately and cooperate with each other, so that the primary winding of the second transformer T2 generates positive and negative pulses in charge-discharge alternation, the second transformer T2 boosts the generated positive and negative pulses, the double-exponential-wave shaping unit 6 is connected with a secondary side winding of the second transformer T2, and the double-exponential-wave shaping unit 6 performs single-phase rectification on the boosted positive and negative pulses to output a unipolar double-exponential-pulse waveform.

In an embodiment of the present invention, as shown in fig. 4, the charging control unit 4 includes: one end of the second inductor L2 is connected to the positive terminal of the direct-current voltage VCC; the anode of the fourth diode D4 is connected with the other end of the second inductor L2; and one end of the fifth capacitor C5 is connected to the cathode of the fourth diode D4, and has a second node, the other end of the fifth capacitor C5 is grounded, and the second node is connected to the first end of the primary winding of the second transformer T2.

Specifically, the charging control unit 4 includes a second inductor L2, a fourth diode D4, a fifth capacitor C5, and a dc voltage VCC, the dc voltage VCC charges the primary winding of the second transformer T2 through the second inductor L2 and the fourth diode D4, the fourth diode D4 has a unidirectional conductivity, the fourth diode D4 can suppress current overshoot in a reverse direction, and the fifth capacitor C5 is used for storing energy.

In an embodiment of the present invention, as shown in fig. 4, the discharge control unit 5 includes: a fifth resistor R5, one end of the fifth resistor R5 being configured to receive the control signal; one end of the sixth resistor R6 is connected with the other end of the fifth resistor R5 and is provided with a third node, and the other end of the sixth resistor R6 is connected to the negative end of the direct-current voltage; a control end of the switching tube Q3 is connected with the third node, a first end of the switching tube Q3 is connected with a second end of the primary winding of the second transformer T2, and a second end of the switching tube Q3 is connected with the other end of the sixth resistor R6; the sixth capacitor C6 and the seventh resistor R7 are connected in series, and the sixth capacitor C6 and the seventh resistor R7 are connected in series between the first end and the second end of the switching tube Q3.

Specifically, the sixth resistor R6 is connected to one end of the fifth resistor R5 and the negative electrode of the dc voltage VCC, the other end of the fifth resistor R5 is configured to receive the control signal, and after the discharge control unit 5 receives the control signal, the discharge control unit 5 controls the switching tube Q3 to be turned on, so that the discharge control unit 5 discharges the primary side winding of the second transformer T2. The sixth capacitor C6 and the seventh resistor R7 connected in series are connected in parallel between the switching tube Q3 and a ground terminal, and the ground terminals of the sixth capacitor C6 and the seventh resistor R7 connected in series are further connected to a negative electrode of the dc voltage VCC, so that the discharge control unit 5 can be protected.

In an embodiment of the present invention, the control signal is a PWM signal.

Specifically, the discharge control unit 5 receives a control signal, which may be a PWM signal, and controls the on/off of the switching tube Q3 according to the PWM signal, so as to control the discharge of the discharge control unit 5, the discharge control unit 5 and the charge control unit 4 alternately generate positive and negative pulse voltages, and the dual-exponential wave shaping unit 6 shapes the positive and negative pulse voltages, so as to obtain dual-exponential pulses.

In an embodiment of the present invention, as shown in fig. 4, the dual-exponential wave shaping unit 6 includes: a fifth diode D5, an anode of the fifth diode D5 being connected to the first end of the secondary winding of the second transformer T2; and one end of the dummy load RR3 is connected to the cathode of the fifth diode D5 and serves as an output end of the dual-exponential wave shaping unit 6, and the other end of the dummy load RR3 is connected to the second end of the secondary winding of the second transformer T2 and then grounded.

Specifically, the primary winding of the second transformer T2 generates positive and negative pulses in the charge-discharge alternation process, the second transformer T2 boosts the generated positive and negative pulses, the dual-exponential-wave shaping unit 6 rectifies the boosted positive and negative pulses, the anode of the fifth diode D5 is connected to the first end of the secondary winding of the second transformer T2, and the dual-exponential-wave shaping unit 6 performs single-phase rectification on the boosted positive and negative pulses through the fifth diode D5 to obtain unipolar dual-exponential pulses.

It should be noted that the dual-exponential pulse generated by the dual-exponential wave shaping unit 6 can reach the us level.

The amplitude and repetition frequency of the bi-exponential pulse waveform can be adjusted by varying the duty cycle and interval time of the PWM control signal received by the discharge control unit 5.

In an embodiment of the present invention, the duty ratio of the PWM signal is in positive correlation with the amplitude of the dual-exponential pulse waveform.

Specifically, the period of the control signal PWM signal is denoted as T, ton is the on-time of the control signal PWM signal, toff is the off-time of the control signal PWM signal, the period of the control signal PWM signal T = Ton + Toff, and the duty ratio duty = Ton/T of the PWM signal, by changing the duty ratio duty of the PWM signal, the amplitude of the dual-exponential pulse waveform can be changed, and the duty ratio of the PWM signal and the amplitude of the dual-exponential pulse waveform have a positive correlation relationship. The duty cycle of the PWM signal decreases and the amplitude of the dual-exponential pulse waveform decreases, whereas the amplitude of the dual-exponential pulse waveform increases.

In one embodiment of the present invention, the interval time of the PWM signal is inversely related to the repetition frequency of the dual-exponential pulse waveform.

Specifically, the interval time of the PWM signal is denoted as Ts, and by changing the interval time Ts of each PWM signal, the repetition frequency of the double-exponential pulse waveform can be adjusted, and the interval time of the PWM signal and the repetition frequency of the double-exponential pulse waveform have a negative correlation. The interval time Ts of the PWM signal increases, the repetition frequency Fm of the dual-exponential pulse waveform decreases, the interval time Ts of the PWM signal decreases, and the repetition frequency Fm of the dual-exponential pulse waveform increases.

Fig. 5 is a schematic diagram of the relationship between the dc bias voltage and the pulse size according to an embodiment of the present invention. As shown in fig. 5, after the streamer discharge driving device 100 is powered on, and after the streamer discharge driving device 100 reaches the normal output voltage of the steady-state weapon, the voltage of the DC platform, the amplitude and the repetition frequency of the double-index pulse can be adjusted. The direct current bias voltage of the output of the DC platform is adjusted by adjusting the external reference given voltage, the amplitude of the double-exponential pulse is adjusted by adjusting the duty ratio of the PWM signal, and the repetition frequency of the double-exponential pulse waveform is changed by adjusting the interval time of the PWM signal. The voltage of the DC platform is in positive correlation with the external reference given voltage, the external reference given voltage Vref is adjusted to be increased, the corresponding direct current bias voltage is increased, the external reference given voltage Vref is adjusted to be decreased, and the direct current bias voltage is decreased. The amplitude of the double-exponential pulse waveform is in positive correlation with the duty ratio of the PWM signal, the duty ratio duty of the PWM signal is reduced, the amplitude of the double-exponential pulse waveform is reduced, and otherwise, the amplitude of the double-exponential pulse waveform is increased. The repetition frequency of the double-exponential pulse waveform and the interval time of the PWM signal are in a negative correlation relationship, the interval time Ts of the PWM signal is increased, the repetition frequency Fm of the double-exponential pulse waveform is decreased, the interval time Ts of the PWM signal is decreased, and the repetition frequency Fm of the double-exponential pulse waveform is increased.

In an embodiment of the present invention, as shown in fig. 1, the coupling portion 30 includes: a sixth diode D6, an anode of the sixth diode D6 being connected to the output terminal of the dc power supply section 10; one end of the eighth resistor R8 is connected to the cathode of the sixth diode D6; one end of the third inductor L3 is connected with the other end of the eighth resistor R8; and a coupling capacitor Cp having one end connected to the output end of the pulse generating part 20 and the other end connected to the other end of the third inductor L3 and serving as an output end of the coupling part 30.

Specifically, an anode of the sixth diode D6 of the coupling portion 30 is connected to an output end of the dc power supply portion 10, one end of the coupling capacitor Cp is connected to an output end of the pulse generating portion 20, and the coupling portion 30 can ensure that the dc power supply portion 10 and the pulse generating portion 20 do not affect each other, on the other hand, when the dc power supply portion 10 and the pulse generating portion 20 work independently, the dc bias voltage generated by the dc power supply portion 10 and the double-exponential pulse generated by the pulse generating portion 20 are coupled, so that the high-voltage dc and the pulse are superimposed, as shown in fig. 6, a schematic diagram after the coupling portion 30 couples the high-voltage dc and the double-exponential pulse, and simultaneously, the superimposed voltage can be loaded to two ends of the load. As shown in fig. 1, resistors RL and CL act as analog loads.

Fig. 7 is a schematic structural diagram of a streamer discharge driving device and a purification load according to an embodiment of the present invention. As shown in fig. 7, the dc power supply unit 10 receives the external reference given voltage Vref, adjusts the external reference given voltage Vref and the dc high voltage output by itself to obtain a dc bias voltage, and outputs the dc bias voltage to the coupling unit 30. The pulse generating part 20 generates a double-exponential pulse signal with adjustable amplitude and frequency according to an intermittent pulse, namely, a PWM control signal, the pulse generating part 20 transmits the double-exponential pulse signal to the coupling part 30, the coupling part 30 can ensure that the direct-current power supply part 10 and the pulse generating part 20 do not influence each other, and on the other hand, the direct-current bias voltage generated by the direct-current power supply part 10 and the double-exponential pulse generated by the pulse generating part 20 are coupled under the condition that the direct-current power supply part 10 and the pulse generating part 20 work independently, so that the superposition of high-voltage direct current and the pulse is realized. The coupling unit 30 is also connected to the purification load 40, and purifies the load 40 by using a chemically active substance generated by streamer discharge in the streamer discharge driving device 100.

The utility model discloses streamer discharge drive arrangement is including the DC power supply portion that is used for providing DC bias voltage, pulse generation portion and coupling portion, DC power supply portion can produce the high-voltage direct current of negative polarity or positive polarity high-voltage direct current, provide accelerating electric field for positive and negative ion, the DC bias voltage amplitude of its output is adjustable, pulse generation portion can produce the double-index ripples of us level, its output pulse's amplitude and interval time are adjustable, coupling portion links to each other with DC power supply portion and pulse generation portion, prevent to exchange and direct current influence each other, also can normally superpose the coupling and apply on the load when guaranteeing DC power supply portion and pulse generation portion independent work. The utility model adopts the high voltage direct current coupling high voltage pulse mode, on one hand, the limit range of breakdown voltage is improved, the phenomenon of striking sparks is greatly reduced, and the stability is also improved; on the other hand, higher ionization degree is obtained, the activity of ions is stronger, the sterilization effect is better, and the concentration of ozone is reduced.

The utility model discloses still provide a clarification plant.

In an embodiment of the present invention, as shown in fig. 8, the purification apparatus 1000 includes the streamer discharge driving device 100 described above.

The utility model discloses streamer discharge drive arrangement and clarification plant, streamer discharge drive arrangement is including the DC power supply portion that is used for providing DC bias voltage, pulse generation portion and coupling portion, DC power supply portion can produce the high-voltage direct current of negative polarity or the high-voltage direct current of positive polarity, provide the electric field with higher speed for positive and negative ions, the DC bias voltage amplitude of its output is adjustable, pulse generation portion can produce the double index ripples of us level, its output pulse's amplitude and interval time are adjustable, coupling portion links to each other with DC power supply portion and pulse generation portion, prevent to exchange and direct current and influence each other, also can normally superpose the coupling and apply on the load when guaranteeing DC power supply portion and pulse generation portion autonomous working. The utility model adopts the high voltage direct current coupling high voltage pulse mode, on one hand, the limit range of breakdown voltage is improved, the phenomenon of striking sparks is greatly reduced, and the stability is also improved; on the other hand, higher ionization degree is obtained, the activity of ions is stronger, the sterilization effect is better, and the concentration of ozone is reduced.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", and the like used in the embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in the embodiments. Therefore, the features of the embodiments of the present invention defined by the terms "first", "second", and the like, may explicitly or implicitly indicate that at least one of the features is included in the embodiments. In the description of the present invention, the word "plurality" means at least two or two and more, for example, two, three, four, etc., unless specifically limited otherwise in the examples.

In the present invention, unless otherwise explicitly specified or limited in relation to the embodiments, the terms "mounted," "connected," and "fixed" appearing in the embodiments are to be understood broadly, for example, the connection may be a fixed connection, a detachable connection, or an integral body, and may be understood as a mechanical connection, an electrical connection, etc.; of course, they may be directly connected or indirectly connected through intervening media, or they may be interconnected within one another or in an interactive relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific implementation.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (18)

1. A streamer discharge driver apparatus, comprising:

a direct-current power supply section for supplying a direct-current bias voltage, the direct-current power supply section including an output voltage adjusting unit configured to control an operating current of the direct-current power supply section in accordance with a reference given voltage and an output direct-current voltage of the direct-current power supply section to adjust the direct-current bias voltage;

a pulse generating section configured to generate a pulse voltage;

the coupling part is respectively connected with the direct current power supply part and the pulse generation part, and the coupling part is configured to couple the direct current bias voltage and the pulse voltage so that the pulse voltage is superposed on the direct current bias voltage and then applied to a load.

2. The apparatus according to claim 1, wherein the dc power supply section further comprises a current control unit, a first transformer, and a rectifying voltage-multiplying unit, the current control unit is connected to the primary winding and the auxiliary winding of the first transformer, the current control unit is configured to control the primary side coupling voltage of the first transformer according to the current regulation signal output by the output voltage regulation unit, the rectifying voltage-multiplying unit is connected to the secondary winding of the first transformer, and the rectifying voltage-multiplying unit is configured to rectify and multiply the secondary side coupling voltage of the first transformer to output the dc bias voltage.

3. The apparatus of claim 2, wherein the current control unit comprises:

one end of the first inductor is connected to a positive direct-current voltage end, and the other end of the first inductor is connected with a middle tap of the primary winding;

a collector of the first triode is connected with the first end of the primary winding, and a base of the first triode is connected with the first end of the auxiliary winding;

a base electrode of the second triode is connected with the second end of the auxiliary winding, a collector electrode of the second triode is connected with the second end of the primary winding, and an emitting electrode of the second triode is connected with an emitting electrode of the first triode and then connected to a direct-current voltage negative electrode end;

one end of the first resistor is connected with the base electrode of the first triode;

one end of the second resistor is connected with the base electrode of the second triode, and the other end of the second resistor is connected with the other end of the first resistor and then serves as the current control end of the current control unit;

and the resonant capacitor is connected between the collector electrode of the first triode and the collector electrode of the second triode.

4. The apparatus of claim 2, wherein the rectifying voltage-doubling unit is at least one stage of voltage-doubling circuit.

5. The apparatus of claim 4, wherein the rectifying voltage-doubler unit comprises:

the anode of the first diode is connected with the first end of the secondary winding;

one end of the first capacitor is connected with the second end of the secondary winding and then grounded, and the other end of the first capacitor is connected with the cathode of the first diode;

one end of the second capacitor is connected with the anode of the first diode;

the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the other end of the second capacitor;

one end of the third capacitor is connected with the anode of the second diode;

and the anode of the third diode is connected with the cathode of the second diode, and the cathode of the third diode is connected with the other end of the third capacitor and is used as the output end of the rectifying voltage-multiplying unit.

6. The apparatus of claim 2, wherein the output voltage regulating unit comprises:

one end of the first feedback resistor is connected with the output end of the rectifying voltage-multiplying unit;

one end of the second feedback resistor is connected with the other end of the first feedback resistor, the second feedback resistor is provided with a first node, and the other end of the second feedback resistor is grounded;

a first operational amplifier, a first input end of which is connected to the first node, and an output end of which is used as an output end of the output voltage regulating unit;

one end of the third resistor is connected with the second input end of the first operational amplifier, and the other end of the third resistor is connected to a reference given voltage supply end;

the first operational amplifier comprises a first resistor and a first capacitor which are connected in series, and the first resistor and the first capacitor which are connected in series are connected between the first input end and the output end of the first operational amplifier.

7. The apparatus of claim 6, wherein the output voltage regulation unit further comprises an isolation component disposed between the first node and the first input of the first operational amplifier.

8. The apparatus of claim 7, wherein the isolation component comprises a second operational amplifier and an isolation chip, a first input of the second operational amplifier is coupled to the first node, a second input of the second operational amplifier is coupled to an output of the second operational amplifier, an input of the isolation chip is coupled to an output of the second operational amplifier, and an output of the isolation chip is coupled to a first input of the first operational amplifier.

9. The apparatus of any one of claims 1-8, wherein the waveform of the pulsed voltage is a bi-exponential pulsed waveform.

10. The apparatus according to claim 9, wherein the pulse generating section includes a charge control unit configured to control charging of a primary winding of the second transformer, a discharge control unit configured to control discharging of the primary winding of the second transformer, a second transformer, and a double exponential wave shaping unit configured to shape a voltage waveform coupled to a secondary winding of the second transformer to obtain the double exponential pulse waveform.

11. The apparatus of claim 10, wherein the charge control unit comprises:

one end of the second inductor is connected to the positive end of the direct-current voltage;

the anode of the fourth diode is connected with the other end of the second inductor;

and one end of the fifth capacitor is connected with the cathode of the fourth diode and is provided with a second node, the other end of the fifth capacitor is grounded, and the second node is connected with the first end of the primary winding of the second transformer.

12. The apparatus of claim 11, wherein the discharge control unit comprises:

a fifth resistor having one end configured to receive a control signal;

one end of the sixth resistor is connected with the other end of the fifth resistor and is provided with a third node, and the other end of the sixth resistor is connected to the negative end of the direct-current voltage;

a control end of the switching tube is connected with the third node, a first end of the switching tube is connected with a second end of the primary winding of the second transformer, and a second end of the switching tube is connected with the other end of the sixth resistor;

and the sixth capacitor and the seventh resistor which are connected in series are connected between the first end and the second end of the switching tube.

13. The apparatus of claim 12, wherein the control signal is a PWM signal.

14. The apparatus of claim 13, wherein a duty cycle of the PWM signal is positively correlated with a magnitude of the bi-exponential pulse waveform.

15. The apparatus of claim 13, wherein the interval time of the PWM signal is inversely related to the repetition frequency of the dual-exponential pulse waveform.

16. The apparatus of claim 10, wherein the dual exponential wave shaping unit comprises:

a fifth diode, an anode of the fifth diode being connected to the first end of the secondary winding of the second transformer;

and one end of the dummy load is connected with the cathode of the fifth diode and is used as the output end of the double-exponential wave shaping unit, and the other end of the dummy load is connected with the second end of the secondary winding of the second transformer and then is grounded.

17. The apparatus of claim 1, wherein the coupling portion comprises:

the anode of the sixth diode is connected with the output end of the direct-current power supply part;

one end of the eighth resistor is connected with the cathode of the sixth diode;

one end of the third inductor is connected with the other end of the eighth resistor;

and one end of the coupling capacitor is connected with the output end of the pulse generation part, and the other end of the coupling capacitor is connected with the other end of the third inductor and serves as the output end of the coupling part.

18. A purification apparatus, characterized by comprising a streamer discharge driver according to any one of claims 1 to 17.

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